4. Haphazard training
At best, most triathletes have vague ideas of what they are trying to accomplish in training. For the most part, they are hoping something magical happens and somehow have a good race.
The fix: You must have a purpose for every workout. That purpose should be aerobic endurance, muscular force, muscular endurance, anaerobic endurance, speed skills or recovery. The higher one’s goals, the more important this becomes.